Home / 1,121,445.56-1,547,575.13-638,000.40

Finding the Fourth Proportional to 1,121,445.56, 1,547,575.13 and 638,000.40

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Solution

The fourth proportional to 1,121,445.56, 1,547,575.13 and 638,000.40 is: 880,429.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,445.56 : 1,547,575.13 = 638,000.40 : x
  2. Step 2: Convert to fraction form
    1,121,445.56/1,547,575.13 = 638,000.40/x
  3. Step 3: Cross multiply
    1,121,445.56x = 1,547,575.13 × 638,000.40
  4. Step 4: Simplify right side
    1,121,445.56x = 987,353,551,970.05
  5. Step 5: Solve for x
    x = 987,353,551,970.05/1,121,445.56
  6. Step 6: Final answer
    x = 880,429.32

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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.