Home / 708,415.86-977,569.49-390,463.86

Finding the Fourth Proportional to 708,415.86, 977,569.49 and 390,463.86

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Solution

The fourth proportional to 708,415.86, 977,569.49 and 390,463.86 is: 538,815.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,415.86 : 977,569.49 = 390,463.86 : x
  2. Step 2: Convert to fraction form
    708,415.86/977,569.49 = 390,463.86/x
  3. Step 3: Cross multiply
    708,415.86x = 977,569.49 × 390,463.86
  4. Step 4: Simplify right side
    708,415.86x = 381,705,556,483.63
  5. Step 5: Solve for x
    x = 381,705,556,483.63/708,415.86
  6. Step 6: Final answer
    x = 538,815.66

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Double scale
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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.