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Finding the Fourth Proportional to 666,214.64, 919,117.98 and 424,454

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Solution

The fourth proportional to 666,214.64, 919,117.98 and 424,454 is: 585,582.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,214.64 : 919,117.98 = 424,454 : x
  2. Step 2: Convert to fraction form
    666,214.64/919,117.98 = 424,454/x
  3. Step 3: Cross multiply
    666,214.64x = 919,117.98 × 424,454
  4. Step 4: Simplify right side
    666,214.64x = 390,123,303,082.92
  5. Step 5: Solve for x
    x = 390,123,303,082.92/666,214.64
  6. Step 6: Final answer
    x = 585,582.00

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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.