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Finding the Fourth Proportional to 708,387.76, 977,575.47 and 402,464.67

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Solution

The fourth proportional to 708,387.76, 977,575.47 and 402,464.67 is: 555,401.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,387.76 : 977,575.47 = 402,464.67 : x
  2. Step 2: Convert to fraction form
    708,387.76/977,575.47 = 402,464.67/x
  3. Step 3: Cross multiply
    708,387.76x = 977,575.47 × 402,464.67
  4. Step 4: Simplify right side
    708,387.76x = 393,439,588,933.65
  5. Step 5: Solve for x
    x = 393,439,588,933.65/708,387.76
  6. Step 6: Final answer
    x = 555,401.45

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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.