Home / 708,417.36-977,571.56-390,465.36

Finding the Fourth Proportional to 708,417.36, 977,571.56 and 390,465.36

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Solution

The fourth proportional to 708,417.36, 977,571.56 and 390,465.36 is: 538,817.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,417.36 : 977,571.56 = 390,465.36 : x
  2. Step 2: Convert to fraction form
    708,417.36/977,571.56 = 390,465.36/x
  3. Step 3: Cross multiply
    708,417.36x = 977,571.56 × 390,465.36
  4. Step 4: Simplify right side
    708,417.36x = 381,707,831,101.16
  5. Step 5: Solve for x
    x = 381,707,831,101.16/708,417.36
  6. Step 6: Final answer
    x = 538,817.73

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.