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Finding the Fourth Proportional to 708,487.72, 977,676.08 and 402,521.64

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Solution

The fourth proportional to 708,487.72, 977,676.08 and 402,521.64 is: 555,458.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,487.72 : 977,676.08 = 402,521.64 : x
  2. Step 2: Convert to fraction form
    708,487.72/977,676.08 = 402,521.64/x
  3. Step 3: Cross multiply
    708,487.72x = 977,676.08 × 402,521.64
  4. Step 4: Simplify right side
    708,487.72x = 393,535,779,110.37
  5. Step 5: Solve for x
    x = 393,535,779,110.37/708,487.72
  6. Step 6: Final answer
    x = 555,458.86

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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.