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Finding the Fourth Proportional to 648,740.40, 972,964.80 and 425,666.40

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Solution

The fourth proportional to 648,740.40, 972,964.80 and 425,666.40 is: 638,403.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,740.40 : 972,964.80 = 425,666.40 : x
  2. Step 2: Convert to fraction form
    648,740.40/972,964.80 = 425,666.40/x
  3. Step 3: Cross multiply
    648,740.40x = 972,964.80 × 425,666.40
  4. Step 4: Simplify right side
    648,740.40x = 414,158,423,742.72
  5. Step 5: Solve for x
    x = 414,158,423,742.72/648,740.40
  6. Step 6: Final answer
    x = 638,403.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.