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Finding the Fourth Proportional to 921,488.40, 1,271,565 and 554,072.40

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Solution

The fourth proportional to 921,488.40, 1,271,565 and 554,072.40 is: 764,566.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,488.40 : 1,271,565 = 554,072.40 : x
  2. Step 2: Convert to fraction form
    921,488.40/1,271,565 = 554,072.40/x
  3. Step 3: Cross multiply
    921,488.40x = 1,271,565 × 554,072.40
  4. Step 4: Simplify right side
    921,488.40x = 704,539,071,306
  5. Step 5: Solve for x
    x = 704,539,071,306/921,488.40
  6. Step 6: Final answer
    x = 764,566.40

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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.