Home / 686,501.28-947,371.71-380,576.89

Finding the Fourth Proportional to 686,501.28, 947,371.71 and 380,576.89

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Solution

The fourth proportional to 686,501.28, 947,371.71 and 380,576.89 is: 525,196.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,501.28 : 947,371.71 = 380,576.89 : x
  2. Step 2: Convert to fraction form
    686,501.28/947,371.71 = 380,576.89/x
  3. Step 3: Cross multiply
    686,501.28x = 947,371.71 × 380,576.89
  4. Step 4: Simplify right side
    686,501.28x = 360,547,779,065.78
  5. Step 5: Solve for x
    x = 360,547,779,065.78/686,501.28
  6. Step 6: Final answer
    x = 525,196.08

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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.