Home / 708,359.40-977,558.81-402,430.21

Finding the Fourth Proportional to 708,359.40, 977,558.81 and 402,430.21

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Solution

The fourth proportional to 708,359.40, 977,558.81 and 402,430.21 is: 555,366.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,359.40 : 977,558.81 = 402,430.21 : x
  2. Step 2: Convert to fraction form
    708,359.40/977,558.81 = 402,430.21/x
  3. Step 3: Cross multiply
    708,359.40x = 977,558.81 × 402,430.21
  4. Step 4: Simplify right side
    708,359.40x = 393,399,192,739.60
  5. Step 5: Solve for x
    x = 393,399,192,739.60/708,359.40
  6. Step 6: Final answer
    x = 555,366.66

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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.