Home / 1,121,410.88-1,547,316-644,390.72

Finding the Fourth Proportional to 1,121,410.88, 1,547,316 and 644,390.72

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Solution

The fourth proportional to 1,121,410.88, 1,547,316 and 644,390.72 is: 889,126.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,410.88 : 1,547,316 = 644,390.72 : x
  2. Step 2: Convert to fraction form
    1,121,410.88/1,547,316 = 644,390.72/x
  3. Step 3: Cross multiply
    1,121,410.88x = 1,547,316 × 644,390.72
  4. Step 4: Simplify right side
    1,121,410.88x = 997,076,071,307.52
  5. Step 5: Solve for x
    x = 997,076,071,307.52/1,121,410.88
  6. Step 6: Final answer
    x = 889,126.45

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Double scale
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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.